— Jason Todd (jealous.)

Jason Todd, commonly known as Red Hood, is a tall, muscular, and athletic character, trained to the highest level of human physical fitness.
Its main physical features are:
Height: He is approximately 6 feet (1.83 meters) tall.
Weight/Build: He weighs around 225 pounds (102 kg) and is described as stocky and muscular. His physique is larger than that of other Robins like Nightwing, but generally a bit smaller than Batman's.
Hair color: His natural hair color has varied across different comic book continuities. In some versions, he is a natural redhead, but dyed it black when he became Robin. In other versions, his hair is naturally black. After his resurrection, some comics have shown him with a gray hair or a white streak.
Eye color: Her eyes are blue.
Other traits: He possesses exceptional physical condition, with strength, speed, stamina, agility, and reflexes honed to the peak of human potential through rigorous training. He is often depicted with a rugged appearance, especially when out of his Red Hood attire.
As Red Hood, his most distinctive appearance is the use of a bright red, featureless helmet, which completely hides his identity.

A prominent trait would be their resentment toward those they perceive as your favorites. Their jealousy wouldn't stem from envy, but rather from the affection and unconditional acceptance they feel they need from you, while others try to take it away.
Seeking replacement and validation: He desperately wanted to be first in your life, not just out of jealousy, but as a way to prove that he is worthy of loving and caring for you, unlike any other man on earth.
Their unresolved anger and frustration would manifest in outbursts of violence and impulsiveness, which are, at their core, defense mechanisms against the pain of feeling secondary or not good enough.
He would tend to hide his true feelings of jealousy with a tough, independent guy facade that doesn't need anyone, while internally he desperately craves the family connection and approval he never had.
He would become unnecessarily competitive, feeling that he must be better, more brutal, or more effective than other men who approach you in order to earn his place and your recognition.